#include "common.h"

int do_proc_net_dev(int update_every, usec_t dt) {
    static procfile *ff = NULL;
    static int enable_new_interfaces = -1, enable_ifb_interfaces = -1;
    static int do_bandwidth = -1, do_packets = -1, do_errors = -1, do_drops = -1, do_fifo = -1, do_compressed = -1, do_events = -1;

    if(dt) {};

    if(!ff) {
        char filename[FILENAME_MAX + 1];
        snprintfz(filename, FILENAME_MAX, "%s%s", global_host_prefix, "/proc/net/dev");
        ff = procfile_open(config_get("plugin:proc:/proc/net/dev", "filename to monitor", filename), " \t,:|", PROCFILE_FLAG_DEFAULT);
    }
    if(!ff) return 1;

    ff = procfile_readall(ff);
    if(!ff) return 0; // we return 0, so that we will retry to open it next time

    if(enable_new_interfaces == -1) enable_new_interfaces = config_get_boolean_ondemand("plugin:proc:/proc/net/dev", "enable new interfaces detected at runtime", CONFIG_ONDEMAND_ONDEMAND);
    if(enable_ifb_interfaces == -1) enable_ifb_interfaces = config_get_boolean_ondemand("plugin:proc:/proc/net/dev", "enable ifb interfaces", CONFIG_ONDEMAND_NO);

    if(do_bandwidth == -1)  do_bandwidth    = config_get_boolean_ondemand("plugin:proc:/proc/net/dev", "bandwidth for all interfaces", CONFIG_ONDEMAND_ONDEMAND);
    if(do_packets == -1)    do_packets      = config_get_boolean_ondemand("plugin:proc:/proc/net/dev", "packets for all interfaces", CONFIG_ONDEMAND_ONDEMAND);
    if(do_errors == -1)     do_errors       = config_get_boolean_ondemand("plugin:proc:/proc/net/dev", "errors for all interfaces", CONFIG_ONDEMAND_ONDEMAND);
    if(do_drops == -1)      do_drops        = config_get_boolean_ondemand("plugin:proc:/proc/net/dev", "drops for all interfaces", CONFIG_ONDEMAND_ONDEMAND);
    if(do_fifo == -1)       do_fifo         = config_get_boolean_ondemand("plugin:proc:/proc/net/dev", "fifo for all interfaces", CONFIG_ONDEMAND_ONDEMAND);
    if(do_compressed == -1) do_compressed   = config_get_boolean_ondemand("plugin:proc:/proc/net/dev", "compressed packets for all interfaces", CONFIG_ONDEMAND_ONDEMAND);
    if(do_events == -1)     do_events       = config_get_boolean_ondemand("plugin:proc:/proc/net/dev", "frames, collisions, carrier counters for all interfaces", CONFIG_ONDEMAND_ONDEMAND);

    uint32_t lines = procfile_lines(ff), l;

    char *iface;
    unsigned long long rbytes, rpackets, rerrors, rdrops, rfifo, rframe, rcompressed, rmulticast;
    unsigned long long tbytes, tpackets, terrors, tdrops, tfifo, tcollisions, tcarrier, tcompressed;

    for(l = 2; l < lines ;l++) {
        uint32_t words = procfile_linewords(ff, l);
        if(words < 17) continue;

        iface       = procfile_lineword(ff, l, 0);

        rbytes      = strtoull(procfile_lineword(ff, l, 1), NULL, 10);
        rpackets    = strtoull(procfile_lineword(ff, l, 2), NULL, 10);
        rerrors     = strtoull(procfile_lineword(ff, l, 3), NULL, 10);
        rdrops      = strtoull(procfile_lineword(ff, l, 4), NULL, 10);
        rfifo       = strtoull(procfile_lineword(ff, l, 5), NULL, 10);
        rframe      = strtoull(procfile_lineword(ff, l, 6), NULL, 10);
        rcompressed = strtoull(procfile_lineword(ff, l, 7), NULL, 10);
        rmulticast  = strtoull(procfile_lineword(ff, l, 8), NULL, 10);

        tbytes      = strtoull(procfile_lineword(ff, l, 9), NULL, 10);
        tpackets    = strtoull(procfile_lineword(ff, l, 10), NULL, 10);
        terrors     = strtoull(procfile_lineword(ff, l, 11), NULL, 10);
        tdrops      = strtoull(procfile_lineword(ff, l, 12), NULL, 10);
        tfifo       = strtoull(procfile_lineword(ff, l, 13), NULL, 10);
        tcollisions = strtoull(procfile_lineword(ff, l, 14), NULL, 10);
        tcarrier    = strtoull(procfile_lineword(ff, l, 15), NULL, 10);
        tcompressed = strtoull(procfile_lineword(ff, l, 16), NULL, 10);

        int ddo_bandwidth = do_bandwidth, ddo_packets = do_packets, ddo_errors = do_errors, ddo_drops = do_drops, ddo_fifo = do_fifo, ddo_compressed = do_compressed, ddo_events = do_events;

        int default_enable = enable_new_interfaces;

        // prevent unused interfaces from creating charts
        if(strcmp(iface, "lo") == 0)
            default_enable = 0;
        else {
            int len = strlen(iface);
            if(len >= 4 && strcmp(&iface[len-4], "-ifb") == 0)
                default_enable = enable_ifb_interfaces;
        }

        // check if the user wants it
        {
            char var_name[512 + 1];
            snprintfz(var_name, 512, "plugin:proc:/proc/net/dev:%s", iface);
            default_enable = config_get_boolean_ondemand(var_name, "enabled", default_enable);
            if(default_enable == CONFIG_ONDEMAND_NO) continue;
            if(default_enable == CONFIG_ONDEMAND_ONDEMAND && !rbytes && !tbytes) continue;

            ddo_bandwidth = config_get_boolean_ondemand(var_name, "bandwidth", ddo_bandwidth);
            ddo_packets = config_get_boolean_ondemand(var_name, "packets", ddo_packets);
            ddo_errors = config_get_boolean_ondemand(var_name, "errors", ddo_errors);
            ddo_drops = config_get_boolean_ondemand(var_name, "drops", ddo_drops);
            ddo_fifo = config_get_boolean_ondemand(var_name, "fifo", ddo_fifo);
            ddo_compressed = config_get_boolean_ondemand(var_name, "compressed", ddo_compressed);
            ddo_events = config_get_boolean_ondemand(var_name, "events", ddo_events);

            if(ddo_bandwidth == CONFIG_ONDEMAND_ONDEMAND && rbytes == 0 && tbytes == 0) ddo_bandwidth = 0;
            if(ddo_errors == CONFIG_ONDEMAND_ONDEMAND && rerrors == 0 && terrors == 0) ddo_errors = 0;
            if(ddo_drops == CONFIG_ONDEMAND_ONDEMAND && rdrops == 0 && tdrops == 0) ddo_drops = 0;
            if(ddo_fifo == CONFIG_ONDEMAND_ONDEMAND && rfifo == 0 && tfifo == 0) ddo_fifo = 0;
            if(ddo_compressed == CONFIG_ONDEMAND_ONDEMAND && rcompressed == 0 && tcompressed == 0) ddo_compressed = 0;
            if(ddo_events == CONFIG_ONDEMAND_ONDEMAND && rframe == 0 && tcollisions == 0 && tcarrier == 0) ddo_events = 0;

            // for absolute values, we need to switch the setting to 'yes'
            // to allow it refresh from now on
            // if(ddo_fifo == CONFIG_ONDEMAND_ONDEMAND) config_set(var_name, "fifo", "yes");
        }

        RRDSET *st;

        // --------------------------------------------------------------------

        if(ddo_bandwidth) {
            st = rrdset_find_bytype("net", iface);
            if(!st) {
                st = rrdset_create("net", iface, NULL, iface, "net.net", "Bandwidth", "kilobits/s", 7000, update_every, RRDSET_TYPE_AREA);

                rrddim_add(st, "received", NULL, 8, 1024, RRDDIM_INCREMENTAL);
                rrddim_add(st, "sent", NULL, -8, 1024, RRDDIM_INCREMENTAL);
            }
            else rrdset_next(st);

            rrddim_set(st, "received", rbytes);
            rrddim_set(st, "sent", tbytes);
            rrdset_done(st);
        }

        // --------------------------------------------------------------------

        if(ddo_packets) {
            st = rrdset_find_bytype("net_packets", iface);
            if(!st) {
                st = rrdset_create("net_packets", iface, NULL, iface, "net.packets", "Packets", "packets/s", 7001, update_every, RRDSET_TYPE_LINE);
                st->isdetail = 1;

                rrddim_add(st, "received", NULL, 1, 1, RRDDIM_INCREMENTAL);
                rrddim_add(st, "sent", NULL, -1, 1, RRDDIM_INCREMENTAL);
                rrddim_add(st, "multicast", NULL, 1, 1, RRDDIM_INCREMENTAL);
            }
            else rrdset_next(st);

            rrddim_set(st, "received", rpackets);
            rrddim_set(st, "sent", tpackets);
            rrddim_set(st, "multicast", rmulticast);
            rrdset_done(st);
        }

        // --------------------------------------------------------------------

        if(ddo_errors) {
            st = rrdset_find_bytype("net_errors", iface);
            if(!st) {
                st = rrdset_create("net_errors", iface, NULL, iface, "net.errors", "Interface Errors", "errors/s", 7002, update_every, RRDSET_TYPE_LINE);
                st->isdetail = 1;

                rrddim_add(st, "inbound", NULL, 1, 1, RRDDIM_INCREMENTAL);
                rrddim_add(st, "outbound", NULL, -1, 1, RRDDIM_INCREMENTAL);
            }
            else rrdset_next(st);

            rrddim_set(st, "inbound", rerrors);
            rrddim_set(st, "outbound", terrors);
            rrdset_done(st);
        }

        // --------------------------------------------------------------------

        if(ddo_drops) {
            st = rrdset_find_bytype("net_drops", iface);
            if(!st) {
                st = rrdset_create("net_drops", iface, NULL, iface, "net.drops", "Interface Drops", "drops/s", 7003, update_every, RRDSET_TYPE_LINE);
                st->isdetail = 1;

                rrddim_add(st, "inbound", NULL, 1, 1, RRDDIM_INCREMENTAL);
                rrddim_add(st, "outbound", NULL, -1, 1, RRDDIM_INCREMENTAL);
            }
            else rrdset_next(st);

            rrddim_set(st, "inbound", rdrops);
            rrddim_set(st, "outbound", tdrops);
            rrdset_done(st);
        }

        // --------------------------------------------------------------------

        if(ddo_fifo) {
            st = rrdset_find_bytype("net_fifo", iface);
            if(!st) {
                st = rrdset_create("net_fifo", iface, NULL, iface, "net.fifo", "Interface FIFO Buffer Errors", "errors", 7004, update_every, RRDSET_TYPE_LINE);
                st->isdetail = 1;

                rrddim_add(st, "receive", NULL, 1, 1, RRDDIM_INCREMENTAL);
                rrddim_add(st, "transmit", NULL, -1, 1, RRDDIM_INCREMENTAL);
            }
            else rrdset_next(st);

            rrddim_set(st, "receive", rfifo);
            rrddim_set(st, "transmit", tfifo);
            rrdset_done(st);
        }

        // --------------------------------------------------------------------

        if(ddo_compressed) {
            st = rrdset_find_bytype("net_compressed", iface);
            if(!st) {
                st = rrdset_create("net_compressed", iface, NULL, iface, "net.compressed", "Compressed Packets", "packets/s", 7005, update_every, RRDSET_TYPE_LINE);
                st->isdetail = 1;

                rrddim_add(st, "received", NULL, 1, 1, RRDDIM_INCREMENTAL);
                rrddim_add(st, "sent", NULL, -1, 1, RRDDIM_INCREMENTAL);
            }
            else rrdset_next(st);

            rrddim_set(st, "received", rcompressed);
            rrddim_set(st, "sent", tcompressed);
            rrdset_done(st);
        }

        // --------------------------------------------------------------------

        if(ddo_events) {
            st = rrdset_find_bytype("net_events", iface);
            if(!st) {
                st = rrdset_create("net_events", iface, NULL, iface, "net.events", "Network Interface Events", "events/s", 7006, update_every, RRDSET_TYPE_LINE);
                st->isdetail = 1;

                rrddim_add(st, "frames", NULL, 1, 1, RRDDIM_INCREMENTAL);
                rrddim_add(st, "collisions", NULL, -1, 1, RRDDIM_INCREMENTAL);
                rrddim_add(st, "carrier", NULL, -1, 1, RRDDIM_INCREMENTAL);
            }
            else rrdset_next(st);

            rrddim_set(st, "frames", rframe);
            rrddim_set(st, "collisions", tcollisions);
            rrddim_set(st, "carrier", tcarrier);
            rrdset_done(st);
        }
    }

    return 0;
}
